Fastener



FIG. 1 is a front view of a fastener of our new design.

FIG. 2 is a right side view of the fastener of FIG. 1 .

FIG. 3 is a perspective view of the fastener of FIG. 1 .

FIG. 4 is a top view of the fastener of FIG. 1 .

FIG. 5 is a bottom view of the fastener of FIG. 1 .

FIG. 6 is an enlarged top view of the fastener of FIG. 1 ; and,

FIG. 7 is an enlarged bottom view of the fastener of FIG. 1 . 

CLAIM The ornamental design for a fastener, as shown and described. 